To explore this further, I'd put an ammeter between the battery post and battery terminal to see how much current these accessories are drawing.
Start with the ign off to measure IOD (ign off draw), then turn the key to ACC with the radio off to measure that, then turn the radio on and measure that.
You can then play a DVD to see how much more current that takes.
I'd be interested in knowing. A 0-10 amp scale should be plenty if you don't crank the starter and DRL's (if equipped) are off.
This would be the best course of action. My preference would be to use a clamp-on Amp meter on the main battery terminal ground wire and observe the current draw initially and after all timers have timed out. Just the inside ceiling lights draw quite a bit during the time they are on before the timer shuts them off (each time a door is opened and closed). With all that is equipped on this vehicle, you will need the highest capacity battery that will fit. Even with that, you may find that 30 minutes is the longest you can listen to the CD player. Keep in mind that there is always a small amount of current going to the radio, TV, ECM, BCM, clocks, security, etc. to keep memory.
If you find that the current draw is above the factory specs, you will need to pull the fuse one at a time for each device to find out which one is drawing more than it should. By having a simple clamp-on Amp meter you can track the problem (if there is any) down quickly.
